5920840809 has 27 divisors (see below), whose sum is σ = 9265498437. Its totient is φ = 3641747616.

The previous prime is 5920840799. The next prime is 5920840823. The reversal of 5920840809 is 9080480295.

The square root of 5920840809 is 76947.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2420935209 + 3499905600 = 49203^2 + 59160^2 .

It is not a de Polignac number, because 5920840809 - 2⁵ = 5920840777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5920840829) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2999947 + ... + 3001919.

Almost surely, 2^5920840809 is an apocalyptic number.

5920840809 is the 76947-th square number.

5920840809 is the 38474-th centered octagonal number.

It is an amenable number.

5920840809 is a deficient number, since it is larger than the sum of its proper divisors (3344657628).

5920840809 is an equidigital number, since it uses as much as digits as its factorization.

5920840809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The cubic root of 5920840809 is about 1809.0939788566.

The spelling of 5920840809 in words is "five billion, nine hundred twenty million, eight hundred forty thousand, eight hundred nine".